Advanced control blocks > Fuzzy Logic Control (FLC) function block

Fuzzy Logic Control function block modes

The Fuzzy Logic Control function block supports the following modes:
  • Manual (Man) — The block output (OUT) can be set manually.

  • Remote output (ROut) — The OUT is calculated by an application that writes to the ROUT_IN parameter.

  • Automatic (Auto) — The SP can be set manually and the block algorithm calculates OUT.

  • Cascade (Cas) — The SP is calculated in another block and is provided to the Fuzzy Logic Control function block through the CAS_IN connection.

  • Remote cascade (RCas) — The SP is calculated by an application that writes to the RCAS_IN parameter.

  • Local override (LO) — The track function is active. OUT is set by TRK_VAL. The BLOCK_ERR parameter shows Local override.

  • Initializing Manual (IMan) — The output path is not complete (for example, the cascade-to-slave path might not be open). In IMan mode, OUT tracks BKCAL_IN.

  • Out of Service (OOS) — The block is not processed. The OUT status is set to Bad: Out of Service. The BLOCK_ERR parameter shows Out of Service.

You can configure the Man, Auto, Cas, RCas, ROut and OOS modes as permitted modes for operator entry.